noun
trolley
A device collecting power from an overhead wire.
The trolley touches the overhead wire and supplies power to the streetcar.
Etymology
Trolley named a small rolling device, including the wheel contacting an overhead wire. The contact device collects power for the vehicle below.
More examples
- A spring keeps the trolley pressed against the wire.
- The streetcar stops when its trolley loses contact with the wire.
- The mechanic checks the trolley for wear.
Forms
trolley · trolleys
Similar words
- pantograph
- Uses a jointed frame to press against the overhead wire.
- collector
- A broader electrical term also covering devices that contact power rails.